diff --git a/src/Rokt-Kit.js b/src/Rokt-Kit.js
index dd86efc..6fec098 100644
--- a/src/Rokt-Kit.js
+++ b/src/Rokt-Kit.js
@@ -26,21 +26,28 @@ var constructor = function () {
     self.launcher = null;
     self.filters = {};
     self.userAttributes = {};
+    self.testHelpers = null;
 
     /**
-     * Generates the Rokt launcher script URL with optional domain override
+     * Generates the Rokt launcher script URL with optional domain override and extensions
      * @param {string} domain - The CNAME domain to use for overriding the launcher url
+     * @param {Array<string>} extensions - List of extension query parameters to append
      * @returns {string} The complete launcher script URL
      */
-    function generateLauncherScript(_domain) {
+    function generateLauncherScript(_domain, extensions) {
         // Override domain if a customer is using a CNAME
         // If a customer is using a CNAME, a domain will be passed. If not, we use the default domain.
         var domain = typeof _domain !== 'undefined' ? _domain : 'apps.rokt.com';
         var protocol = 'https://';
         var launcherPath = '/wsdk/integrations/launcher.js';
+        var baseUrl = [protocol, domain, launcherPath].join('');
 
-        return [protocol, domain, launcherPath].join('');
+        if (!extensions || extensions.length === 0) {
+            return baseUrl;
+        }
+        return baseUrl + '?extensions=' + extensions.join(',');
     }
+
     /**
      * Passes attributes to the Rokt Web SDK for client-side hashing
      * @see https://docs.rokt.com/developers/integration-guides/web/library/integration-launcher#hash-attributes
@@ -64,6 +71,7 @@ var constructor = function () {
         filteredUserAttributes
     ) {
         var accountId = settings.accountId;
+        var roktExtensions = extractRoktExtensions(settings.roktExtensions);
         self.userAttributes = filteredUserAttributes;
         self.onboardingExpProvider = settings.onboardingExpProvider;
         var domain = window.mParticle.Rokt.domain;
@@ -75,6 +83,7 @@ var constructor = function () {
         if (testMode) {
             self.testHelpers = {
                 generateLauncherScript: generateLauncherScript,
+                extractRoktExtensions: extractRoktExtensions,
             };
             attachLauncher(accountId, launcherOptions);
             return;
@@ -84,7 +93,7 @@ var constructor = function () {
             var target = document.head || document.body;
             var script = document.createElement('script');
             script.type = 'text/javascript';
-            script.src = generateLauncherScript(domain);
+            script.src = generateLauncherScript(domain, roktExtensions);
             script.async = true;
             script.crossOrigin = 'anonymous';
             script.fetchPriority = 'high';
@@ -189,6 +198,22 @@ var constructor = function () {
         return self.launcher.selectPlacements(selectPlacementsOptions);
     }
 
+    /**
+     * Sets extension data for Rokt Web SDK
+     * @param {Object} partnerExtensionData - The extension data object containing:
+     * - [extensionName] {string}: Name of the extension
+     * - [extensionName].options {Object}: Key-value pairs of options for the extension
+     * @returns {void} Nothing is returned
+     */
+    function setExtensionData(partnerExtensionData) {
+        if (!isInitialized()) {
+            console.error('Rokt Kit: Not initialized');
+            return;
+        }
+
+        window.Rokt.setExtensionData(partnerExtensionData);
+    }
+
     function onUserIdentified(filteredUser) {
         self.filters.filteredUser = filteredUser;
         self.userAttributes = filteredUser.getAllUserAttributes();
@@ -287,6 +312,7 @@ var constructor = function () {
 
     // Kit Callback Methods
     this.init = initForwarder;
+    this.setExtensionData = setExtensionData;
     this.setUserAttribute = setUserAttribute;
     this.onUserIdentified = onUserIdentified;
     this.removeUserAttribute = removeUserAttribute;
@@ -365,6 +391,25 @@ function mergeObjects() {
     return resObj;
 }
 
+function parseSettingsString(settingsString) {
+    try {
+        return JSON.parse(settingsString.replace(/&quot;/g, '"'));
+    } catch (error) {
+        throw new Error('Settings string contains invalid JSON');
+    }
+}
+
+function extractRoktExtensions(settingsString) {
+    var settings = settingsString ? parseSettingsString(settingsString) : [];
+
+    var roktExtensions = [];
+    for (var i = 0; i < settings.length; i++) {
+        roktExtensions.push(settings[i].value);
+    }
+
+    return roktExtensions;
+}
+
 if (window && window.mParticle && window.mParticle.addForwarder) {
     window.mParticle.addForwarder({
         name: name,
diff --git a/test/src/tests.js b/test/src/tests.js
index b859ce7..8369f9e 100644
--- a/test/src/tests.js
+++ b/test/src/tests.js
@@ -63,14 +63,11 @@ describe('Rokt Forwarder', () => {
 
         this.initializeCalled = false;
         this.isInitialized = false;
-
         this.accountId = null;
         this.sandbox = null;
         this.integrationName = null;
-        this.noFunctional = null;
-        this.noTargeting = null;
-
         this.createLauncherCalled = false;
+
         this.createLauncher = function (options) {
             self.accountId = options.accountId;
             self.integrationName = options.integrationName;
@@ -1209,5 +1206,78 @@ describe('Rokt Forwarder', () => {
                     'https://cname.rokt.com/wsdk/integrations/launcher.js'
                 );
         });
+
+        it('should return base URL when no extensions are provided', () => {
+            const url =
+                window.mParticle.forwarder.testHelpers.generateLauncherScript();
+            url.should.equal(baseUrl);
+        });
+
+        it('should return base URL when extensions is null or undefined', () => {
+            window.mParticle.forwarder.testHelpers
+                .generateLauncherScript(undefined, null)
+                .should.equal(baseUrl);
+
+            window.mParticle.forwarder.testHelpers
+                .generateLauncherScript(undefined, undefined)
+                .should.equal(baseUrl);
+        });
+
+        it('should correctly append a single extension', () => {
+            const url =
+                window.mParticle.forwarder.testHelpers.generateLauncherScript(
+                    undefined,
+                    ['cos-extension-detection']
+                );
+            url.should.equal(baseUrl + '?extensions=cos-extension-detection');
+        });
+
+        it('should correctly append multiple extensions', () => {
+            const url =
+                window.mParticle.forwarder.testHelpers.generateLauncherScript(
+                    undefined,
+                    [
+                        'cos-extension-detection',
+                        'experiment-monitoring',
+                        'sponsored-payments-apple-pay',
+                    ]
+                );
+            url.should.equal(
+                baseUrl +
+                    '?extensions=cos-extension-detection,' +
+                    'experiment-monitoring,' +
+                    'sponsored-payments-apple-pay'
+            );
+        });
+    });
+
+    describe('#roktExtensions', () => {
+        beforeEach(async () => {
+            window.Rokt = new MockRoktForwarder();
+            window.mParticle.Rokt = window.Rokt;
+
+            await window.mParticle.forwarder.init(
+                {
+                    accountId: '123456',
+                },
+                reportService.cb,
+                true
+            );
+        });
+
+        describe('extractRoktExtensions', () => {
+            it('should correctly map known extension names to their query parameters', async () => {
+                const settingsString =
+                    '[{&quot;jsmap&quot;:null,&quot;map&quot;:null,&quot;maptype&quot;:&quot;StaticList&quot;,&quot;value&quot;:&quot;cos-extension-detection&quot;},{&quot;jsmap&quot;:null,&quot;map&quot;:null,&quot;maptype&quot;:&quot;StaticList&quot;,&quot;value&quot;:&quot;experiment-monitoring&quot;}]';
+                const expectedExtensions = [
+                    'cos-extension-detection',
+                    'experiment-monitoring',
+                ];
+
+                window.mParticle.forwarder.testHelpers
+                    .extractRoktExtensions(settingsString)
+                    .should.deepEqual(expectedExtensions);
+            });
+        });
     });
 });